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Tanya [424]
3 years ago
6

At the market 5 light bulbs cost $9. How much do 7 cost

Mathematics
1 answer:
Naddik [55]3 years ago
5 0

Answer:

$12.6

Step-by-step explanation:

9/5=x/7

1.8=x/7

*7    *7

12.6=x

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Write an equation for the line that is parallel to the given line and passes through the given point
Evgesh-ka [11]

Answer:

y = 2x + 2

Step-by-step explanation:

The equation ofa line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 2x + 4 ← is in slope- intercept form

with m = 2

Parallel lines have equal slopes , thus

y = 2x + c ← is the partial equation

To find c substitute (3, 8) into the partial equation

8 = 6 + c ⇒ c = 8 - 6 = 2

y = 2x + 2 ← equation of parallel line

4 0
3 years ago
How many times does 20 go into 168?
ch4aika [34]
The answer:

8 times

Explanation:

If you divide 168 by 20, you get 8.4, and the whole number is 8 so that’s the answer.
7 0
3 years ago
Read 2 more answers
A scuba diver descends 63 feet in 18 seconds.
Elanso [62]

Answer:

3.5

Step-by-step explanation:

the answer is 3.5 because when you divide 63 and 18 you get 3.5

5 0
3 years ago
What is divide able by 39 and 250
Alexxandr [17]
Well it would be 39 because 39 ÷ 39 would be 1, and you should be able to divide 250 by 39 too!  Hope that helped!
7 0
3 years ago
Coffee café mix 90 pounds of coffee that cost six dollars per pound the types of coffee used to make this makes you cost seven d
Troyanec [42]

Answer:

y =  60

Step-by-step explanation:

From the  information we get:

x  quantity of 4 dollars  coffee used in the mix

y  quantity of 7 dollars  coffee used in the mix

For the quantity of coffee to be sold a 7 $/pound  ( 90 pounds)

Then  6*90  =  540  $

Therefore

x  +  y  =  90     and

4*x  +  7*y  =  540

A two equations system we solve for x and y

y =  90  -  x

4*x  +  7* ( 90  -  x ) = 540

4*x  +  630 - 7*x  =  540

- 3*x  =  - 90

x = 30 pounds   and

y  =  90  -  30

y  =  60

We should use  60 pounds of the seven $ coffee

4 0
3 years ago
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